关于胎儿成熟度检查的叙述，下列哪项不正确（）
A.羊水L/S>2.0表示胎儿肺成熟
B.羊水肌酐浓度≥176.8μmol/L提示胎儿肾成熟
C.羊水A450<0.02提示胎儿肝成熟
D.羊水脂肪细胞出现率<20%表示胎儿皮肤成熟
E.羊水淀粉酶活性>120苏氏单位表示为成熟儿
参考答案：D
解析：羊水脂肪细胞出现率>20%，则表示胎儿皮肤成熟。
| Mr. Faugel was convinced that student nervousness had affected their scores; to reduce the anxiety of these students who had already been tested, he gave 22 of them a beta blocker before readministration of the test. Their scores improved significantly. The other 8 students (who did not receive the beta blockers) improved only slightly. Second-time test-takers nation-wide had average improvements which were similar to those in Faugel’s non-beta blocker group. Beta blockers are prescription drugs which have been around for 25 years. These medications, which interfere with the effects of adrenalin, have been used for heart conditions and for minor stress such as stage fright. Now they are used for test anxiety. These drugs seem to help test-takers who have low scores because of test fright, but not those who do not know the material. Since there can be side effects from these beta blockers, physicians are not ready to prescribe them routinely for all test-takers. |
Faugel’s research showed that beta blockers given to his sample
A．increased scores less than the national average.
B．increased scores the same as the national average.
C．decreased scores.
D．increased scores much more than the national average.
